kernel.git/tools/testing/selftests/cgroup, branch linux-5.10.y

kseltest/cgroup: Make test_stress.sh work if run interactively

2022-06-09T08:21:30Z

commit 213adc63dfbcdff9a0c19ec1f2681fda9c05cf6d upstream. Commit 54de76c01239 ("kselftest/cgroup: fix test_stress.sh to use OUTPUT dir") changes the test_core command path from . to $OUTPUT. However, variable OUTPUT may not be defined if the command is run interactively. Fix that by using ${OUTPUT:-.} to cover both cases. Signed-off-by: Waiman Long Signed-off-by: Tejun Heo Signed-off-by: Greg Kroah-Hartman

kselftest/cgroup: fix test_stress.sh to use OUTPUT dir

2022-06-09T08:21:07Z

[ Upstream commit 54de76c0123915e7533ce352de30a1f2d80fe81f ] Running cgroup kselftest with O= fails to run the with_stress test due to hardcoded ./test_core. Find test_core binary using the OUTPUT directory. Fixes: 1a99fcc035fb ("selftests: cgroup: Run test_core under interfering stress") Signed-off-by: Phil Auld Signed-off-by: Tejun Heo Signed-off-by: Sasha Levin

selftests: cgroup: Test open-time cgroup namespace usage for migration checks

2022-04-13T19:01:10Z

commit bf35a7879f1dfb0d050fe779168bcf25c7de66f5 upstream. When a task is writing to an fd opened by a different task, the perm check should use the cgroup namespace of the latter task. Add a test for it. Tested-by: Michal Koutný Signed-off-by: Tejun Heo Signed-off-by: Ovidiu Panait Signed-off-by: Greg Kroah-Hartman

selftests: cgroup: Test open-time credential usage for migration checks

2022-04-13T19:01:10Z

commit 613e040e4dc285367bff0f8f75ea59839bc10947 upstream. When a task is writing to an fd opened by a different task, the perm check should use the credentials of the latter task. Add a test for it. Tested-by: Michal Koutný Signed-off-by: Tejun Heo Signed-off-by: Ovidiu Panait Signed-off-by: Greg Kroah-Hartman

selftests: cgroup: Make cg_create() use 0755 for permission instead of 0644

2022-04-13T19:01:10Z

commit b09c2baa56347ae65795350dfcc633dedb1c2970 upstream. 0644 is an odd perm to create a cgroup which is a directory. Use the regular 0755 instead. This is necessary for euid switching test case. Reviewed-by: Michal Koutný Signed-off-by: Tejun Heo Signed-off-by: Ovidiu Panait Signed-off-by: Greg Kroah-Hartman

selftests/cgroup: Fix build on older distros

2022-04-13T19:01:10Z

commit c2e46f6b3e3551558d44c4dc518b9667cb0d5f8b upstream. On older distros struct clone_args does not have a cgroup member, leading to build errors: cgroup_util.c: In function 'clone_into_cgroup': cgroup_util.c:343:4: error: 'struct clone_args' has no member named 'cgroup' cgroup_util.c:346:33: error: invalid application of 'sizeof' to incomplete type 'struct clone_args' But the selftests already have a locally defined version of the structure which is up to date, called __clone_args. So use __clone_args which fixes the error. Signed-off-by: Michael Ellerman Signed-off-by: Sachin Sant > Acked-by: Christian Brauner Signed-off-by: Shuah Khan Signed-off-by: Ovidiu Panait Signed-off-by: Greg Kroah-Hartman

kselftests: cgroup: add perpcu memory accounting test

2020-08-12T17:57:55Z

Add a simple test to check the percpu memory accounting. The test creates a cgroup tree with 1000 child cgroups and checks values of memory.current and memory.stat::percpu. Signed-off-by: Roman Gushchin Signed-off-by: Andrew Morton Cc: Christoph Lameter Cc: David Rientjes Cc: Dennis Zhou Cc: Johannes Weiner Cc: Joonsoo Kim Cc: Mel Gorman Cc: Michal Hocko Cc: Pekka Enberg Cc: Shakeel Butt Cc: Tejun Heo Cc: Tobin C. Harding Cc: Vlastimil Babka Cc: Waiman Long Cc: Michal Koutný Cc: Bixuan Cui Cc: Stephen Rothwell Link: http://lkml.kernel.org/r/20200608230819.832349-6-guro@fb.com Signed-off-by: Linus Torvalds

kselftests: cgroup: add kernel memory accounting tests

2020-08-07T18:33:25Z

Add some tests to cover the kernel memory accounting functionality. These are covering some issues (and changes) we had recently. 1) A test which allocates a lot of negative dentries, checks memcg slab statistics, creates memory pressure by setting memory.max to some low value and checks that some number of slabs was reclaimed. 2) A test which covers side effects of memcg destruction: it creates and destroys a large number of sub-cgroups, each containing a multi-threaded workload which allocates and releases some kernel memory. Then it checks that the charge ans memory.stats do add up on the parent level. 3) A test which reads /proc/kpagecgroup and implicitly checks that it doesn't crash the system. 4) A test which spawns a large number of threads and checks that the kernel stacks accounting works as expected. 5) A test which checks that living charged slab objects are not preventing the memory cgroup from being released after being deleted by a user. Signed-off-by: Roman Gushchin Signed-off-by: Andrew Morton Cc: Christoph Lameter Cc: Johannes Weiner Cc: Michal Hocko Cc: Shakeel Butt Cc: Tejun Heo Cc: Vlastimil Babka Link: http://lkml.kernel.org/r/20200623174037.3951353-19-guro@fb.com Signed-off-by: Linus Torvalds

tools/testing/selftests/cgroup/cgroup_util.c: cg_read_strcmp: fix null pointer dereference

2020-08-07T18:33:21Z

Haven't reproduced this issue. This PR is does a minor code cleanup. Signed-off-by: Gaurav Singh Signed-off-by: Andrew Morton Reviewed-by: Andrew Morton Cc: Shuah Khan Cc: Tejun Heo Cc: Michal Koutn Cc: Roman Gushchin Cc: Christian Brauner Cc: Chris Down Link: http://lkml.kernel.org/r/20200726013808.22242-1-gaurav1086@gmail.com Signed-off-by: Linus Torvalds

Merge tag 'spdx-5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/spdx

2020-04-03T20:12:26Z

Pull SPDX updates from Greg KH: "Here are three SPDX patches for 5.7-rc1. One fixes up the SPDX tag for a single driver, while the other two go through the tree and add SPDX tags for all of the .gitignore files as needed. Nothing too complex, but you will get a merge conflict with your current tree, that should be trivial to handle (one file modified by two things, one file deleted.) All three of these have been in linux-next for a while, with no reported issues other than the merge conflict" * tag 'spdx-5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/spdx: ASoC: MT6660: make spdxcheck.py happy .gitignore: add SPDX License Identifier .gitignore: remove too obvious comments